<!DOCTYPE html>
<html lang="en">
<head>
    <meta charset="UTF-8">
    <meta name="viewport" content="width=device-width, initial-scale=1.0">
    <meta http-equiv="X-UA-Compatible" content="ie=edge">
    <title>Document</title>
    <style>

        *{
            padding: 0px;
            margin: 0px;
        }
        div {
            width: 200px;
            height: 200px;
            /* margin: 100px auto; */
            background-color: pink;
            position: absolute;
            left: 50%;
            margin-left: -100px;
            margin-right: -100px;
            /* top: 10%; */
        }
    </style>
</head>
<body>
    <div></div>
</body>
</html>